Flood watches have also been issued for the north-east of the state and Goulburn and Broken rivers.

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The warnings follow Tuesday's heavy downpours, which contributed to peak-hour commuter chaos as Victoria sweats through a monsoonal period.

But they will come as good news for firefighters battling blazes in the state's north-east and east.

Rain has helped stem some fires across Victoria but has not been enough to extinguish them, firefighters say.

Efforts to douse two key fires in Victoria's east, the 85,000-hectare Aberfeldy-Donnellys and the 97-hectare fire near the Thomson water catchment, both benefited from about 11 millimetres of rain overnight.

Heyfield incident controller Dennis Matthews said the rain meant firefighters could go into the areas to conduct "blacking out" work, which meant breaking open smouldering logs to allow them to burn out.

"It should allow us to slow the run of the fire," Mr Matthews said.

He said he hoped the rain and fire prevention work would protect the town of Licola.

Firefighters have been in Licola for weeks to ensure the fire did not encroach on the town.

"We expect to have most of the work in the Licola valley completed by the end of the week and enable public access into that part of the world. It is important for the area leading up to the Easter holiday period," Mr Matthews said.

After a long, dry spell, parts of Victoria are experiencing unusually tropical conditions, with relative humidity up to 93 per cent at 1am. In fact, temperatures in the city were higher overnight than for all of Tuesday morning.

The coolest temperature on Tuesday was at 7.30am, when the mercury dipped to 17 degrees. The temperature peaked at 27 degrees at 5.30pm, and hovered in the low 20s overnight. At 2.30am, it was still 22 degrees.

Between 9am Tuesday and 6am Wednesday, Fiskville, near Bacchus Marsh in the state's west, had Victoria's highest amount of rainfall, with 64 millimetres, while at nearby Parwan there had been 27mm. In the metropolitan area, the highest falls were 17mm at Officer and 12mm at Clayton.

By Friday, the rain is expected to disappear completely. The Bureau of Meteorology has predicted a possible morning shower, but from Saturday to Tuesday, the days are expected to be sunny, with tops reaching the low 30s at the start of next week.